Weighing scale



Patented Nov.v 1, '1927. Y

UNITED i. stares WETZEL, OF TOLEDO, OHIO, ASSIGNOR TO TOLEDO SCALECOMPANY, OT?l TOLEDO, OHIO,A CORPORATION OF NEW JERSEY. l'

LEWIS C.

PATENT oFFl'cEp WEIGHING SCALE,

Application slearanuary evfieae. serial No. 84,009. 1

This invention relates to weighing scales,`

and -one of its principal objects is to improve "the means `employed forstabilizing `pivotally mounted members, such as the m-eans .forpreventing` the platform from tipping or tilting when a load is placedradjacent one of :its edges. i

Another object of `this invention is the provision of a. stabilizingmeans 'for asca'le platform of the :ty-pe forming a push rand pull`connect-ion ybetween the moving parts,

the check link being provided with adjust! which reference is had to theaccompanying my invention.`

drawings illustrating one embodiment of my invention and wherein similarreference numerals designate similar parts throughout the several views.A

In the,l drawings r Figure I is an elevational view of a weighing scaleof the counter type embodying my invention; A

Figure II is an enlarged top p lan view lof the platformstabilizing-mechanism per 's-e;"

Figure III is an elevational view of the parts illustrated in Figure II;

Fig. IV is an enlarged fragmentary detail sectional view takensubstantially on the line IV-IV of Figure II;'and

Figure Vis a perspective view of one of the knife edge members forming apart o Referring vto the drawings in detail, I have illustrated myinvention as incorpo rated in a counter scale of the fan type, but it isto be understood that I contemplate the use of my invention wherever itmay be found applicable, the scale per se forming no part,4 of thepresent invention. The scale comprises'a substantially hollow base 1,one

'ceiver 6. Y

The nose end of the lever projects into a end thereof `being providedwith `an integral upwardly projecting fulcrum stand 2 which supportsthemain lever 3 lof the scale. The

lever 3 is also provi-ded with load `pivots which support a` spider 5,the latter surmounted by a platform oreeommodity-.re-v

housing 9 erected upon the other end of the base and :is operativelyconnected 'to some form of load counterbalancing mechanism comprising apendulum `10 pivotally `'supported within the housing 9, the pendulumbeing provided with an upwardly extending indicator hand 11 adapted toco-operate with a chart located in the fan-shaped upper portion of thehousing to indicate weights 'of loads placed upon the platform 6.

The improved platform stabilizing mechl anism formi-ng the principalobject vof this invention will now be described. The platformlsupporting spider 5 is provided with a depending stem 12, the lower endthereof having a reduced portion preferably noncircular in cross sectionto which is secured a double knife edge member 13, the knife edges beingopposed and longitudinally aligned, as shown in Figure V.4^'iidjust-ably secured Vto the basel is ya rod 14 also provided with aknife edge member 15 substantially the same as the member 13. "The checklink or stabilizing means connecting the knife edges of these memberscomprises a pair of substantially parallel members or bars 16 and 17,the member 16 having upwardly turned fend portions 18 and V19,\the end 18 having a cone-shaped bore therethrough which forms a socket or seatfor the spherical 'portion of a bearing retaining member 20 within whichis 'embedded la jeweled bearing piece '21' 'formed of agate or othersuitable hard material. IThe 'other end 19 lof the bar 16 is providedwith' a threadedk bor-e having a threaded bushing 22 retained therein bymeans -of a set screw 23. The bushing is provided with a boretherethrough, the inner extremity of the bushing being cone-shaped toform a seat for a bearing yretaining member 24 carrying-a.

herewith a push connection. VThe mem-` bers 16 and 17 are held in properrelation to each other by means of aA connecting bar I 34 fixedlysecu-red. at one end to the member 16 by means of a screw 35, the otherend of the bar bemgbent so as to form a loop surf rounding the tubularmember 17 and of slightly greater diametral dimension than that of themember 17 so as to permit slight relative movement of said members.lThrust members 36'are lalso embedded in the bearing retaining members 20and 2e adjacent the bearing pieces to limit the relative lat.- Ieralmovement of the connecting members 16 and 17.

The agate bearing pieces are provided vwith V-shaped grooves whichengage the knife edges, the apex line of which passes through the centerof curvature and therefore lies along a diameter of the sphericalportions of the bea-ring retaining members. It will be understood thatwhen each of the bearing retaining members is seated in its cone-shapedsocket the apex line of the groove may turn about its center in any diwrection` but the center of the line must always remain in the sameposit-ion' and the bearing cannot, therefore, shift bodily. It will beobvious that with this construction the .bearings may automaticallyalign themselves with their respective knife edges so that a fullline'engagement may be had beu tweeneaeh bearing and knife edge. kThisconstruction insures a decreased bearing pressure per unit of length ofthe knife edges, with a consequent increase in the life of the mechanismand vless chance for errors in the scaleI when aload is placed adjacentone edge of the load receiving platform.

The embodiment of myinvention herein shown and described isV to beregarded as illustrative only, and it is to be understood that theinvention is susceptible to variati on` modification and change withinAthe spirit and scope of the subjoined claims.

Having described my invention, I claim:

1. In a device of the classdescribed, in

combination, weighing mechanism including a load receiving platform, amember connected to said platform, av check link member,one ofsaidmembers having a socket and a bearing` resting in Isaid socket. saidbearingadapted for engageinentwith a pivot carried a load receiving`platform, a member con` nected to said platform, a check link member.pivotallyconnected to said platform member, a socket 1n one of saidmembers,a bear-V ingpiece having a port-ion of its surface spherical 1nform resting 1n said socket,

means for retaining said bearing in the sock-- et, and a pivot carriedby the other of said members engaging said bea-ring piece to form apivotal joint.

4. In a device of the class described, in combination, weighingmechanism including a load receiving platform, a memberconnected to saidplatform, a check link member, one of said members having a socket,means connecting said members comprising a bearing piece having aportion o-f its surface spherical in form and resting in said socket,said bearing piece having a V-shaped groove therein, and means includingaV knife edge carried by the other of said members and engaging thegroove in said bearing to form a pivotal joint. 7 Y

5. In a device of. the class described, 'in combination. weighingmechanism including a load receiving platform, a membery con'- nectedtosaid platform, and a check ink member pivotally connected to saidplatform member. said Vpivotal means comprising a jeweled bearingcarried by one of said members, said bearing engaging a pivot carried bythe other member to form al connection therebetween.

6. In a device of the class describedfin combination, weighing mechanismincluding a load receiving platform, stabilizing means for said platformcomprising relatively mov-. 'able members, a Jeweled bearing carried byVable members, and a jewel'ed bearing having aV-shaped Igroove carriedby one of said members,` said bearing engaging a'knife edge pivotcarried byV another of said membersto form a pivotal connectiontherebetween.

8. Inv a 'device of the class described, in

combination, weighing mechanism, a load receiving platform connectedtosaid weighing mechanism'and having an extension, stabilizing means forsaid platform comprisingl a link, a jeweled bearing carried by said linkand having .a V-shaped lgroove therein, and a knife edge member carriedby said platform extension, said bearing` and knife edge (3o-operatingVto form a pivotal joint between the link and platform extension.

9. A pivotal connection ycomprising a pair of relatively movablemembers, pivots carried by said members, connecting means for saidmovable members comprising a pair of links, and jeweled bearing piecescarried by said links, said bearing pieces engaging said knife edges to`form a push and pull connection.

10. A pivotal connection comprising a pair of relatively movablemembers, knife edges on said members, a pair of links, and

Y jeweled bearing pieces secured to said links and being relativelymovable with respect thereto, said bearing'pieces adapted to engage andproperly align themselves with said knife edges to form a push and pullconnection between said relatively movable members. y

1l. A pivotal connection comprising a pair of relatively movablemembers, knife edges on said members, a connecting link having aplurality of sockets, and bearings resting in said sockets, saidybearings Iengaging said knife edges to form a pivotal connection bentween said relatively movable members.

l2. A pivotal connection comprising a pair of relatively movablemembers, knife edges on said members, a connecting link having aplurality of sockets, and jeweled bearings resting in said sockets, saidbearings engaging the knife edges to form a pivotal connection between.said

bers.

13. A pivotal connection Y comprising a pair of relatively movablemembers, knife edges on said members, a connectingV link having aplurality of sockets, and jeweled bearings resting in said sockets, saidbearings engaging the knife edges to form a pivotal connection'betweensaid relatively movable members.

14. A pivotal connection comprising a pair of relatively movablemembers, oppositely disposed longitudinally aligned knife edges on saidmembers, a pair of connecting links each having a plurality of sockets,and bearings resting in said sockets, said bearings engaging said knifeedges to form a push and pull7 connection.

LEWIS. C. WETZEL.

relatively movable mem-V

